/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.camel.component.kafka.serde;

import java.math.BigInteger;

import org.apache.camel.Exchange;
import org.apache.camel.support.ExpressionAdapter;
import org.apache.camel.support.builder.ValueBuilder;

public final class KafkaSerdeHelper {

    private KafkaSerdeHelper() {
    }

    public static ValueBuilder numericHeader(String name) {
        return new ValueBuilder(new ExpressionAdapter() {
            @Override
            public Object evaluate(Exchange exchange) {
                byte[] id = exchange.getIn().getHeader(name, byte[].class);
                BigInteger bi = new BigInteger(id);
                return String.valueOf(bi.longValue());
            }
        });
    }
}
